duke@435: /*
trims@1907:  * Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // machine-dependent implemention for register maps
duke@435:   friend class frame;
duke@435: 
duke@435:  private:
duke@435:   intptr_t* _window;         // register window save area (for L and I regs)
duke@435:   intptr_t* _younger_window; // previous save area (for O regs, if needed)
duke@435: 
duke@435:   address pd_location(VMReg reg) const;
duke@435:   void pd_clear();
duke@435:   void pd_initialize_from(const RegisterMap* map) {
duke@435:     _window         = map->_window;
duke@435:     _younger_window = map->_younger_window;
duke@435:     _location_valid[0] = 0;  // avoid the shift_individual_registers game
duke@435:   }
duke@435:   void pd_initialize() {
duke@435:     _window = NULL;
duke@435:     _younger_window = NULL;
duke@435:     _location_valid[0] = 0;  // avoid the shift_individual_registers game
duke@435:   }
duke@435:   void shift_window(intptr_t* sp, intptr_t* younger_sp) {
duke@435:     _window         = sp;
duke@435:     _younger_window = younger_sp;
duke@435:     // Throw away locations for %i, %o, and %l registers:
duke@435:     // But do not throw away %g register locs.
duke@435:     if (_location_valid[0] != 0)  shift_individual_registers();
duke@435:   }
duke@435:   void shift_individual_registers();
duke@435:   // When popping out of compiled frames, we make all IRegs disappear.
duke@435:   void make_integer_regs_unsaved() { _location_valid[0] = 0; }